Self-heating sad-iron.



G. B. HUDSON & W. P. BOPE.

. SELF HEATI NG SAD IRON.

APPLICATiON FILED DEC. 29, 1913. RENEWED MAR. 15, 1915.

1 3]. 3@,3$& Patented Apr. 20, 1915.

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15 1 I l (56/3ylli a ils W a 3 9 aw'uewto'as lm mm I M THE NORRIS PETERSc0.. FHOTC-LITHO.. WASHINGTON. D. C.

G. B. HUDSON & W. P. BOPE.

SELF HEATING SAD IRON.

APPLICATION man 05c. 29, 1913. RENEWED MAR. :5. 1915.

Patented Apr. 20, 1915.

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THE NORRIS PETERS 60., PHOTO-LITHQ. WASHINGTON. D. c.

GEORGE B. HUDSON AND WILLIAM P. BOPE, 0F DECATUR, MICHIGAN.

sELnHEA'rING SAD-IRON.

Specification of Letters Patent.

Patented Apr. 20, 1915.-

Gontinuation in part of application Serial No. 697,116, filed. May 14,1912. This application filed December 29, 1913, Serial No. 809,159.Renewed March 15, 1915. Serial No. 14,505.

To all whom it may concern.

Be it known that we, GEORGE B. HUDSON and WILLIAM P. Born, citizens ofthe United States, residing at Decatur, Michigan, have invented certainnew and useful Improvements in Self-Heating Sad-Irons, of which thefollowing is a specification.

This invention relates to improvements 1n self heating sad-irons inwhich gasolene or similar hydrocarbon fuel is used.

The objects of this invention are: F irst, to provide an improved burnerstructure for use in such a sad-iron, having an lmproved valve and valvehead structure. Second, to provide in such a self heating sad-1ron animproved cover construction. Thlrd, to provide in such a structure,easily removable means for deflecting the heat downwardly.

Further objects and objects relating to details and economies ofconstruction will definitely appear from the detailed descriptlon tofollow.

We accomplish the objects of 011I1IlV611- tion by the devices and meansdescrlbed 1n the following specification.

The invention is clearly defined and pointed out in the claims.

A. structure which is a preferred embod1- ment of our invention isclearly illustrated in the accompanying drawing forming a part of thisspecification, in w h1ch:

Figure I is a side perspectlve view of a sad-iron embodying the featuresof our 1nvention. Fig. II is an enlarged detail longitudinal sectionalview thereof, taken on a line corresponding to line 22 of F gs. III andIV. Fig. III is a sectional view taken on a line corresponding to line33 of Fig. II, a portion of the handle being broken away. Fig. IV is adetall sectional view taken on line 44 of Figs. II and III, with theburner and generator tube removed. Fig. V is a detail plan view of theinner top plate 7. Fig. VI is a detail plan view of the inner end of thetubular burner, the extreme inner end thereof being shown in section.Fig. VII is a perspective view of one of the heat deflecting membersremoved from the sad-iron. Fig. VIII is an enlarged detail sectionalView on the line 88 of Fig. II, showing the burner valve. Fig. IX is adetail elevational view showing the top plate engaging one of thenotched lugs on the sad-iron.- Fig. X is a detail sectional view on theline 1010 of Fig. III, showing details of the lug and set screw forsecuring the cover in place. Fig. XI is a detail sectional view showingamodified form of handle and the means for securing the same to the topplate.

In the drawing the sectional views are taken looking in the direction ofthe little arrows at the ends of the section lines and similar numeralsof reference refer to similar parts throughout the several views.

Considering the numbered parts of the drawing, the main body of thesad-iron 1 is hollow and of the usual external form, being pointed atboth ends, the forward end being centrally notched for the support ofthe generator tube. The cover comprises an outer top plate 2 and aninner top plate 7 The outer top plate 2 carries the handle 3, which ispreferably made of wood or similar material, and secured by means of thescrews 5 to the members 4 projecting upwardly from and integral with thetop plate 2. From the bottom side of the top plate 2 project the lugs 6which are received in suitable openings 8 in the top plate 7. The lowerside of the top plate 2 is provided with a boss 10. The stove-bolt 12passes through said boss and through an alined opening 11 in the topplate 7, and secures the two top plates together. Boss 10 serves tospace the two top plates from each other so as to permit the circulationof air between them, thus serving to keep the top plate as cool aspossible. The top plate 7 is also provided with apertures 9, 9, to aidin the circulation of the air for cooling the cover.

Upwardly projecting lugs 13 on the side walls of the sad-iron areprovided with notches 14: on the rear sides thereof. These lugs aredisposed in notches 15 in the inner plate 7 so that the notches 14engage the edges of said inner top plate. Upwardly projecting spacinglugs 16 are provided at the opposite sides of the plate 7 Supporting andspacing lugs 16 are also provided on said plate. The plate 7 is notchedtoward its rear end at 15 and receives in said notches the upwardlyprojecting lugs 17 which extend to a proper height to contact with theouter cover plate 2 so that when the cover is removed they serve assupports for a frying pan or kettle so that the burner may be used as astove. Lug 18 depends from the under side of the top plate 7 and a setscrew 19, disposed through one of the transverse walls 20 of thesad-iron, engages said lug to prevent rearward movement of the plate 7and hence secure the cover in place. Apertures are formed by the notches21 in the side walls of the sad-iron to permit the circulation of airand the escape of the heated gases, to aid in cooling the top. The airfor combustion is admitted through the burner tube.

Between the transverse walls 20 of the sad-iron is disposed the burnersupport 22 which is suitably grooved and tapered so as to fitsubstantially gas tight at this joint. The generator tube 24 is screwthreaded into this burner support 22 and bottoms against a suitable seatto make a gas tight joint. This tube is disposed in notch 26 at thefront end of the sad-iron, and a gasolene or fuel reservoir 25 iscarried on the outer end thereof. The burner support 22 is integral witha suitable valve casing and chamber 27 into which the generator tubeopens, is connected by the oblique passage 28 with the valve chamber 29.The needle valve 30 is provided in the said chamber and said Valve issomewhat less in diameter than the chamher, so that a space is providedaround the valve which is filled with the generated gas. Said needlevalve terminates in the needle point 31 which fits into a suitablytapered seat 32 in the Valve casing. The needle valve is provided with asquare shoulder 34 which fits against a corresponding square shoulder 35in the valve casing at the end of the chamber 29. The needle point isfiattened at 33 on each side to afford a very free passage when thevalve is open and to accommodate any accumulation of grit or the like,and said point normally projects beyond the face of the valve casing tokeep the opening free from dirt. The square shoulders insure a perfectseating of the valve and a perfect closing of the same. The valve isscrew threaded and provided with a suitable stuifing box and is squaredat its outer end for the use of a wrench or key. These features clearlyappear'in Figs. II and VIII. This structure insures, as indicated, thefree passage of the gas and the certain feeding of the gas at therestricted jet orifice and insures the ready delivery of the gas withoutany likelihood of the bore of the jet aperture being injured.

A tubular burner 36 is inserted into a suitable opening in the burnersupport 22 and is adjustably secured in position by means of the setscrew 39. The inner end of the burner is provided with a plug 38 and theburner is suitably perforated as at 37 toward the under side so as todirect the jets of flame downwardly. However, this burner is reversibleand the jets of flame may be directed either up or down as desired. Thesad-iron with this single burner is very effective for all uses andeffectively heats the generator in any position to which it may beadjusted.

It is of the highest importance to secure jet action from the valve toforce the gas into the tubular burner at a strong pressure so that airwill be entrained and carried in in sufficient amount to completecombustion when the mixture passes beyond the burner in the hollowsad-iron.

To aid in heating the bottom of the sadiron, I have provided the members40 which serve to keep the heat from the burner 36 in the bottom of thesad-iron, and to deflect a portion of it so that it will strike thegenerator tube and heat the same perfectly. These members 40 aresuitably curved to conform to the curvature of the sad-iron and theircentral portions are T-shaped in cross section, being provided on theirupper edge with the deflecting flanges 41. The ends of said members aredirected inwardly and they are of such length that when a pair of thesemembers are disposed in the bottom of the sad-iron, with the centralportions 011- gaging the sides thereof, the ends will fit normally inengagement with each other. WVhen the burner is started the heattherefrom will cause these members to expand so that they will be heldtightly in the bottom of the sadiron. They can be removed as desiredwhen the sad-iron is cool and they have contracted to their normal size.

In Fig. XI we have shown a modification in which is provided a curvedhandle 4-2 of wood or similar material having at its ends protectingwashers 43. This handle is secured to the cover by means of the screwell passing through the cover and into the handle 42. The top plates 2and 7 are provided with upstanding lugs 45 and l6 respectively forspacing the handle relative to the plate 2 and the plate 2 relative tothe plate 7. This insures the complete circulation of the air betweenthe parts and aids in keeping the same cool.

When it is desired to use the sad-iron as a heater the tubular burnercan be turned so that the jets will be directed upwardly, delivering theheat where it is desired to use it. Owing tothe strong jet action whichwe secure by our improved valve structure we are able to entrain anddeliver enough air in the tubular burner along with the gas and undersuch pressure that it passes out of the tubular burner through theperforations into the hollow sad-iron and burns very effectively withoutany other air inlet to deliver air to support combustion. The aperturesin the upper part of the sad-iron are merely for the escape of theheated gases. The effect of the apertures 9 through the inner plate 7 isto secure circulation and to distribute the heated air quickly and alsoto permit the ingress of cold air to keep the top plate cool.

The burner support is held in place by means of the top plate 7 and thelatter is held in position by the set screw 19 engaging against thedepending lug 18. It will thus be seen that the single set screw 19retains all the parts in place. By making the heat deflecting members 40so that they can be removed when the sad-iron is cold it is very easy toturn the sad-iron into a stove. The ends of the deflecting members 40which are disposed nearest the valve casing are beveled so as to form aV-shaped notch 40. The base of the sad-iron at the rear end is providedwith a flange 48 which forms a reservoir 47. To start the burner thecover is removed and the burner support 22 is lifted a slight distance.Alcohol is then poured into the base of the sad-iron and into thereservoir 17 It is then ignited and the flame heats the burner andgenerator tube to start the same. The reservoir 47 insures the thoroughpreheating of the valve casing.

We are aware that the particular embodiment which we have here shown issusceptible of considerable variation with departing from the spirit ofour invention, and, therefore we do not wish to be restricted to thesame. However, we have found that this particular embodiment of ourinvention is to be preferred, and we desire to claim the samespecifically as well as broadly as in dicated by the appended claims.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent, is:

1. In a self heating sad-iron and heater, the combination with a tubularburner, of a needle valve casing for said burner, with a reduced taperednozzle aperture and a shouldered valve seat; and a needle valve with aneedle point conformed to said nozzle aperture and flattened at itssides, and shouldered to fit said shouldered valve seat, the said nozzledisposed to deliver to said tubular burner, all coacting as specified.

2. In a self heating sad-iron and heater, the combination with a tubularburner, of a needle valve casing for said burner, with a reduced taperednozzle aperture and a shouldered valve seat; and a needle valve with aneedle point conformed to said nozzle aperture, flattened at its sides,and shouldered to fit said shouldered valve seat, said needle pointnormally projecting beyond the face of said casing, the said nozzledisposed to deliver to said tubular burner, said valve casing beingprovided with a chamber surrounding said needle valve, all coacting asspecified.

3. In a self heating sad-iron and heater, the combination with saidsad-iron, of a cover therefor comprising inner and outer top plates, ahandle supported on said outer top plate, upwardly extending lugs on theside walls of said sad-iron, rearwardly directed notches in said lugs,notches in the inner top plate adapted to receive said lugs with theedges of said top plate engaging in said lug notches, upwardly extendinglugs on said inner top plate, said lugs being adapted to support theupper top plate in spaced relation to the inner top plate, a lugdepending from the inner top plate, and a set screw carried by the rearwall of said sad-iron and engaging said depending lug to preventrearward movement of the inner top plate, all coacting as specified.

4. In a self-heating sad-iron, a pair of removable heat defiectingmembers curved in conformity with the curvature of the sadiron andadapted to be disposed in the base thereof, said members carryingdeflecting flanges on the upper edge thereof, the ends of said membersbeing adapted to engage each other, all coacting substantially asdescribed for the purpose specified.

5. In a self heating sad-iron, a burner support slidably mounted in therear wall of said sad-iron, a burner and valve casing carried by saidsupport, a starting reservoir in the base of said sad-iron beneathsaidburner head, and a pair of heat deflecting members disposed in thebase of said sadiron and having their ends nearest the valve casing,notched, all coacting as specified.

In witness whereof, We have hereunto set our hands and seals in thepresence of two witnesses.

GEORGE B. HUDSON. WILLIAM P. BOPE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

